Heater



FIG. 1 is a front perspective view of a heater according to the invention;

FIG. 2 is a front view of the heater of FIG. 1;

FIG. 3 is a rear view of the heater of FIG. 1;

FIG. 4 is a top view of the heater of FIG. 1;

FIG. 5 is a bottom view of the heater of FIG. 1;

FIG. 6 is a left side view of the heater of FIG. 1;

FIG. 7 is a rear perspective view of the heater of FIG. 1; and,

FIG. 8 is a front view of the heater of FIG. 1 when the two parts are separated.

The portion shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a heater, as shown and described. 